Xiaomi, Redmi and Poco smartphone owners often face intrusive ads, sudden pop-ups, or strange system behaviors believing that the device is infected. In fact, an Android operating system with a MIUI shell or a new HyperOS has built-in protection, but the user factor often negates it. Understanding what you think is a virus is the first step to solving the problem.
Often, the virus hides aggressive ad modules installed along with free apps, or permissions that you accidentally gave to dubious sites. In rare cases, the device does actually hit a Trojan or miner capable of overheating the processor and stealing personal data. It is important not to panic, but to consistently perform a series of actions to diagnose and clean the gadget.
In this article, we will discuss effective methods for removing a virus on Xiaomi using only built-in system tools and proven utilities, learn how to distinguish system errors from malicious code and prevent re-infection in the future.
Diagnosis: symptoms of real infection
Before we take any drastic measures, we need to clearly identify the problem, many users confuse software failures or MIUI features with viral activity, and real malicious code manifests itself in a specific way that is difficult to ignore.
Pay attention to the battery behavior. If your phone, which used to hold a charge for a day, now runs out in a few hours in standby mode, it's an alarm bell. Background processes of miners or spies consume the CPU resources even when the screen is off.
Also, you should be wary of the appearance of unknown icons on the desktop, viruses often masquerading as system services or innocuous utilities like Clearer or Flashlight. If you did not install an application, and it appeared, this is a reason to check.
- 🚀 A sharp drop in performance: interfaces open with a delay, games slow down, the phone warms up without load.
- 📢 Intrusive advertising: pop-ups appear on top of the desktop, in the browser, or even when unlocking the screen.
- 📉 Mobile Internet bills up, though you haven’t changed your network usage habits.
- 🔒 Access blocking: inability to open settings or run antivirus, screen blockers with payment requirement.
⚠️ Warning: If the phone is blocked by a message about the FSB lockdown or a request to transfer money, do not pay the bill in any case.This is a fraud, and restarting in safe mode or a complete reset will help solve the problem.
Use of the built-in antivirus Security
Xiaomi is preinstalling a powerful Security app on its devices, which is based on the engines of leading antivirus laboratories such as Avast or AVL. This is the first tool that should be launched if a threat is suspected.
Run the app through the menu or find it in the Tools folder. Click on Security Check. The system will scan the installed applications, files and system partitions for known virus signatures.
If a threat is found, the application will prompt the removal of the malicious file. In some cases, manual intervention is required if the virus has tried to gain administrator rights, in which case the standard check may not cope, and you will have to delete the application through the settings.
It is important to update the virus databases in the Security app regularly. Click on the three dots in the top right corner and select "Update Virus Bases." Top-of-the-line signatures allow you to identify the latest threats that may have appeared on Google Play or third-party stores.
Analysis of installed applications and removal of suspicious applications
Often, applications downloaded from unverified sources are the source of problems, malicious code can be hidden in modified versions of games, photo editing programs or "hooked" utilities, installed software must be audited.
Go to Settings → Apps → All apps. Look for programs without a name, with a transparent icon or a strange name consisting of a set of characters, often without an icon in the menu, but actively working in the background.
If you find a suspicious object, click on it and select Delete. If the delete button is inactive, the application has device administrator rights. You need to go to Settings → Passwords and Security → Privacy → Special Access Rights → Device administrator apps and disable the tick opposite the suspicious program.
☑️ Checking applications
| Type of application | Signs of threat | Action |
|---|---|---|
| Flash players | Requires access to contacts and SMS | remove immediately |
| Optimizers | Showing ads in a status bar | Replace with built-in |
| Games from APK | Requesting root rights at launch | Delete and check with antivirus |
| browsers | Opening tabs on their own | Clear the data and cache |
After removing suspicious programs, restart the device, which will allow the system to complete all background processes associated with the remote software and free up the memory that is occupied.
Cleaning the browser and blocking pop-up ads
Sometimes the problem isn't with the virus, but with allowing sites to show notifications, and you could accidentally click "Allow" on a questionable resource, and now it spams you with notifications even when the browser is off.
To remove this, open your browser settings (Chrome, Mi Browser or otherwise). Find Site Settings → Notifications. View the list of permitted sites and delete any unknown or suspicious addresses.
It is also recommended to clear the cache and browser data. Go to Settings → Applications → Application Management → Your browser → Storage. Click the "Clear Cache" and "Clear All" buttons (or "Reset"), which will delete saved logins and history, but is guaranteed to remove scripts that cause advertising.
Why does the advertisement appear after the application is removed?
For additional protection, you can use the Safe Browse feature in Google Chrome settings, which warns about dangerous sites and blocks malicious code from loading in the background.
Run in Safe Mode to Remove Unremovable Viruses
If the virus does not open settings or is deleted but reappears, you must enter Safe Mode. In this mode, Android only runs with system applications, which blocks the activity of malicious code.
To enter, press the power button on the side of the device. When the turn off menu appears on the screen, press and hold your finger on "Stop" (or "Complete"). A request will appear to go to safe mode - confirm the action.
If you're in Safe Mode, you'll see a sign in the corner of the screen, and you can now go to the app settings and remove the virus that previously blocked access to the system, and then reboot the phone in the normal way.
⚠️ Note: Some features will not work in Safe Mode, such as: NFC It's a little bit different, it's a little bit different, it's a little bit different, and it's all about finding and removing the source of the problem.
If the standard input doesn’t work, you can try a combination of volume buttons when turned on, but on modern Xiaomi with MIUI 12/13/14 and HyperOS, the method through the off menu is the main one.
Full reset (Hard Reset) as a last resort
If none of the methods worked, the radical, but 100% effective way is a complete factory reset, which will remove all data from your phone, including photos, contacts and apps, so be sure to back up important files to the cloud or your computer before you start.
You can reset through the settings menu if the phone is unlocked. Go to Settings → About Phone → Reset → Erase all data. The system will warn you if you lose data — confirm the action.
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Before resetting your settings, make sure that the battery is at least 50% so that the phone doesn’t turn off during the data erasure process, which can damage system files.
If the menu is not available, you can use Recovery mode. Turn off the phone completely. Press the power button and the volume button (+) at the same time. Hold them until the Mi logo appears, then release them.
From the Recovery menu, select English, then go to Wipe Data → Wipe All Data. Confirm. Once you've finished, select Reboot → Reboot to System.
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A complete reset removes 99.9% of all known viruses, as it completely rewrites the system partition and clears the user’s memory.
Once turned on, the phone will be like new. Don't rush to restore all the applications from backup at once. Install them one at a time, checking the system to ensure that the virus does not return back with the data.
How to Protect Xiaomi in the Future
Smartphone protection starts with the user's habits. The main source of viruses is installation. APK-Files from questionable sites and forums. Try to download apps only from the official Google Play store or GetApps.
Update your operating system regularly. In MIUI updates and Android security patches, developers are closing vulnerabilities that hackers can penetrate into your device. You can check for updates in About Phone → MIUI.
- 🛡️ Activate Google Play Protect: This feature automatically scans apps even from third-party sources.
- 🚫 Disable the installation from unknown sources: after using the desired application again forbid the browser installation APK.
- 📱 Do not follow suspicious links: SMS or messengers from unknown numbers.
Digital hygiene will help you avoid most security issues, and remember that antivirus is only the last line of defense, and your attention is the first.